Dessicator 2

What Is a Desiccator?
A desiccator is a chamber or box that is
designed to absorb water vapor from
reactants that are hygroscopic . Hygroscopic
reagents are able to absorb water. This can
cause a problem when it comes to measuring
the appropriate amounts of a particular
chemical. The desiccator reduces this effect
and helps to ensure accurate measurements
of chemicals prior to the start of a chemical
reaction. In other words, desiccators are used
to dry any chemicals that may be used in
reactions.
A Dessicator Containing a Dessicant
Desiccators are usually sealed so that outside
air cannot enter the chamber. In some cases,
desiccators may also be fitted with a vacuum
hose in order to remove excess air from the
inside of the chamber. A desiccant , or drying
material, is usually added to the desiccator to
absorb water vapor whenever the desiccator
is opened. Calcium chloride (a salt) and silica
gel (a non-reactive solid) are two typical
desiccants that are used routinely. The
desiccants ensure that water vapor is
absorbed before it reaches the reactant